Hard start

2002 F150 4.2 V6 with 149k mi.Starts good in the morning. After warmed up, i have to crank for a few seconds, turn off and crank for about 3 seconds before it hesitantly starts. Also, there's a fuel smell i think due to slight flooding from cranking, not sure. However, if starting within 5-6 minutes of shutoff, it starts fine. Anything longer though, up to even 4 or 5 hours of sitting it has trouble. Replaced starter, fuel pump, filter, pressure regulator, 3 suspect injectors, plugs, wires, coil pack, crank position sensor, throttle sensor, cleaned MAF and throttle body, and ran premium with sea foam of course. Thinking theft system? Running out if ideas. Thanks for any advice.

Not that i can tell. I wondered about a dripping
injector. I changed three along the way because i
thought they were maybe bad. Would a leaky
injector still work like a good injector while
running? It just runs so good otherwise. I
appreciate the input. Should i just test the
pressure over varying time periods?

i can start it up right a way first start,after driving for a while shut it off go in to the store come out and try to start it has to turn over about 20 times befor it starts,i have change fuel filte...

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